/*
 * Copyright 2002-2018 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.web.util.pattern;

import org.springframework.web.util.pattern.PathPattern.MatchingContext;

/**
 * A separator path element. In the pattern '/foo/bar' the two occurrences
 * of '/' will be represented by a SeparatorPathElement (if the default
 * separator of '/' is being used).
 *
 * @author Andy Clement
 * @since 5.0
 */
class SeparatorPathElement extends PathElement {

    SeparatorPathElement(int pos, char separator) {
        super(pos, separator);
    }


    /**
     * Matching a separator is easy, basically the character at candidateIndex
     * must be the separator.
     */
    @Override
    public boolean matches(int pathIndex, MatchingContext matchingContext) {
        if (pathIndex < matchingContext.pathLength && matchingContext.isSeparator(pathIndex)) {
            if (isNoMorePattern()) {
                if (matchingContext.determineRemainingPath) {
                    matchingContext.remainingPathIndex = pathIndex + 1;
                    return true;
                } else {
                    return (pathIndex + 1 == matchingContext.pathLength);
                }
            } else {
                pathIndex++;
                return (this.next != null && this.next.matches(pathIndex, matchingContext));
            }
        }
        return false;
    }

    @Override
    public int getNormalizedLength() {
        return 1;
    }

    public String toString() {
        return "Separator(" + this.separator + ")";
    }

    public char[] getChars() {
        return new char[]{this.separator};
    }

}
